Yes , although they are very difficult to contemplate, since the appropriate atmospheric conditions must exist and that the observer is located in the perfect place of observation. If this happens, the rays of the sun and the raindrops combine to create a complete ring of light. Curiously, in the circular rainbow, the colors appear inverted , that is, violet is the outermost and red, the innermost. The last such rainbow on record was seen on the Malaysian island of Langkawi in 2007.
Are there totally circular rainbows?
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